There is a fascinating account of pearl-like UFOs seen repeatedly in the city of Yangzhou during the reign of Emperor Jiayou (1056-1064) of the Song Dynasty. The case is significant because a record and commentary on this “strange happening” was included by Shen Kuo (1031-1095) in his classic “Mengxi Bitan” Dream Pool Essays of 1088.

An Air China jet was forced to make an emergency landing after experiencing a large bang. Upon landing, the nose cone was found dented, and it was suspected that the plane collided with something, but just what caused the damage is still under debate.